MESON Chess Problem Database

Problem Display
PID: 117083 (8/8/6B1/6p1/7k/8/3K2Q1/5N1n w - - 0 1)

Krizhanivsky, Vasil Viktorovich

Pabirnitakh Kaissi, 1990

8/8/6B1/6p1/7k/8/3K2Q1/5N1n

#2

4 + 3

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
  • Tries
    • 1.Kc1?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Ke1?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Kc2?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Ke2?
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Kc3?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Ke3?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Sh2?
      • threat
        • 2.Sf3#
        • 2.Qg4#
      • 1...g4
        • 2.Qxg4#
      • 1...Sf2
        • 2.Sf3#
      • 1...Sg3!
    • 1.Bf5?
      • threat
        • 2.Qxh1#
        • 2.Qh3#
        • 2.Qh2#
        • 2.Qg4#
      • 1...Kh5
        • 2.Qxh1#
        • 2.Qh3#
        • 2.Qh2#
      • 1...g4
        • 2.Qxg4#
      • 1...Sg3
        • 2.Qh3#
        • 2.Qh2#
      • 1...Sf2!
    • 1.Bf7?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Be8?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...g4!
    • 1.Qf3?
      • threat
        • 2.Qh5#
      • 1...Sg3
        • 2.Qxg3#
      • 1...g4!
    • 1.Qxg5+?
      • 1...Kh3
        • 2.Bf5#
      • 1...Kxg5!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sf5#
        • 2.Qh2#
        • 2.Qg4#
      • 1...g4
        • 2.Qxg4#
      • 1...Sf2
        • 2.Sf5#
      • 1...Sg3
        • 2.Qh2#

Anticipated by 77523(1978)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(C),XP(c)
        • S(a);::S(A)
      • Refutation
        • S(a);
    • Try
      • B(D);
      • Threat
        • DUALS(4)
      • Vars
        • P(c);::QAR1(C),XP(c)
      • Refutation
        • S(a);
    • Try
      • B(D);
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • B(D);
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::B(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • S(A);
    • Threat
      • DUALS(3)
    • Vars
      • P(c);::QAR1(C),XP(c)
      • S(a);::S(A)
      • S(a);::QAR2(C)
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